Means for and method of securing mortise and tenon joints



March 2 1932- D. P. MOORE 1,850,764

MEANS FOR AND METHOD OF SECURING MOR'I'ISE AND TENON JOINTS Filed Jan.25. 19:50

Pa ented; Mar. 22,f@1932 1; j

19mm) rnnronimoorm,ornvoni nnm FLORIDA i i i Mme 30R nnnmnrnonorsnoumneivronrlsn AND rnnonzromrs 1 Application filed Ianuarye'25, 1920; Serialno 423,451., I

The present, invention, relates to improve-- i ments'in means for endmethods of securing the-joint completed with the device in attach}mortise andtenon ]j,oints,one object of the ing and-holdingposition;" iinvention being the; provisionof a metallic device provided with meansto cooperate, both of device before bending. r 55 Figure 4 isasimilarview to Figure lof I V ftFignre' 51s a planvlew ofthezmetaliblank T "With a sl'otin the tenon' and the walls at the baseof the mortise whereby asthe tenonis forced intothe mortise'the deviceis operated and'set in place to in turn attach the ltenon 19 both byitself beinga fastener and by causing the end of the tenontobeeXpandedQa-nd thus be wedged into the mortise; s

Another object ofthis inventionis the provision of 1a -,device'adaptedito enter a slot V "formedintheend oithe tenants the tenon is,

being forced in themortise, such action forcing a prongIterinina-lcarried by the device transverselyof the mortise to piercethe Wall thereof at its base, while spreading the slotted end of thetenon tofprovide a vdoublev acting locking and attaching device forsuch, ]oint, and rendering the use of an adhes ve unneces= ,saryL'Severaldevices have heretofore been del signed for attaching the .tenontothemortise,

V but they-have been unsatisfactory for when they were attached to theexterior of the tenon, nolwedging action tookrplace, andwhen they actedas a wedging device the base of; the

i wall of the mortisezwas not engaged in apractica1 manner. This deviceovercomes these ob ect1ons by providing 1110118 metallic member atenonwedging device,-which while eiifectingqthe wedging, action,itit'self acted upon to drive one-or more prongs, into the -,walls atthe base of the mortise.

7 In order to properly understandthe present invention attention isinvited to the ac.- wcompanying drawings, in-which'have beenil- 9lustrated several of a number of: difierent de-;

signsofdevices for accomplishing the results aboveset forth, and inwhich l I I Figure lis a side'elevation' of one form of device per se. oFigure 2 is abottom plan viewthereo-f;

Figure 3 is a detached plan and sectional view of a mortise-and tenono1ht'separated with the present device inserted in the slot ofthemembers.

forms of :"devices', all same principles;

Referring to the drawing's',and more par-1 ticularly to Figures 1through 5, 10 fdesigof the tenonand justvprevious to the joining Figures6, 1, Sand 9 are views of modified of which embody the natefs themortise carrying member andf'may betakenf'as indicativeofaVchairfIamQi'Oclrer, or other piece of; ftirniturglin which a v usualsocke't: 'l l -is; provided, ll A tenon I12, hereshown 'a'scha'ir-Trung, is provided with The wedgingand attaching device 14 hereshown as a memberstampedfr'om sheet metaLpreferab'ly rather stifi'[sheet steelor iron, o

v is ,bentcentrally asat 15 to providethe relas tively fiat slotentering portion. 16, and the a two .divergingportions' 17 and {18,which cause thedevice at this portioninplanview r tofbe afmodifiedV any,the termina1s19, and 7 20, being, of lesser width, than their respecitive carrying portion and'heing' bentttoward each otherbutin parallel,so'that when'the device is" 'not in'u'se the'extreme ends 21'and 22 ofthefgterminals are near1y within"the;' v extreme base edges of the:triang1e,, and

slightly below" the respective opposite cute away or guiding edges ofthe portions 17 and '18. The termina1s19 and 20 -be ing in sub-H I*stantially thesame plane and provide albase' a to rest uponand tocontact firmly the base of 5 the mortise when connecting the mortise andtGIIOIljOlIitJ Where so desired each portion 17 or18l'maylbeprovidedwith a short piercingtooth or l prong '23, which is normallyhoused withinthe space between the portions 17"andr18,'and; aligned whenthe portions are compressed together so as to pass through v theopeningfl i formedin the opposite por- 'tions, or as shown'the tooth isformed from;

the portion 17 andthe opening'in'the portion 1811f desirable, atooth'and opening may becarried byrboth portions, thus providingoppositely, projecting teeth when the 'po'r tions 17 and 18 arecompressed together.

To use the device, theportion 16 is first.

' inserted in the end of the slot 13 of the rung,

such portions 17 and 18 and, entering the.

walls of the socket at the base upon opposite sides, so that-when therung is fully seated,

the parts will assume the position as shown in Figure 4. As the portions17 'and'18 were entering .the slot 13, the wedgingaction of.

within the slotc'aused the endof the rung to be slightly spreadso that,the walls of, the rung were forced 'frictionally' against the walls ofthe socket and, thus adouhle fastener was provided. Also as the portions17 and18 were being broughttogether within the slot 13, the tooth orteeth 23 were caused to bite into the material of the rang and thusmoresecurely fastened the device the rung.

In Figure) 6,11 slightly modified are is shown, and in which only onepiercin terminali s provided,,the device being ot erwise' exactly; likethat shown in jEi -gure 1,,and si'milar parts being designated by primeindica-[ tions. a

InFigure-7,gthe portion 17 is shorter and is provided'with a tooth 23upon. its end for entering the opening 24".

.In Figure 8, theportions 17' and 1'8 each carry respectivelya tooth 23'and circular opening 24", while in Figure '9, the device is made of asingle piece ofwire, bent. primarily U-staple shaped, and then formedto: provide the slot enteringshort ill-shaped portion 25, the twooutwardly bent portions 26 and 27, and the inwardly bent and parallelpiercing terminals 28 and 29. r

In all of these examples, the same action takesplace when the rung isforcedintoits socket, and a joint .is formed that makes the use ofanadhesive unnecessary andone-which is not affected by the climate, andone which will hold fast under all conditions. What is claimed as new,is I 1. The herein described method of attaching a tenon in a mortise,which consists in placing alocking andwedging device adjacent theslottedend of a tenon and presslng 'the tenon into the mortise tocompress a part'of the device within the slotted end and'cause thedevice to project outwardly at rightangles to the base of the mortiseand to the walls of the mortise into piercing relation one or moreprongs, so that said prongs plerce the walls of-the mortise at its basewhile the wedging portion thereof. spreads theend of the tenon intowedging relation to the mortise,

2. A fastener for mortise and tenon joints, includinga metallic memberprovided with two angularly spaced portions, one of which which thepiercing terminals, lie approximateiy' side by side inthe same plane.-

5., fastener according to claimv 2, in which one of the angularly spacedportions is provided with an incised short piercing tooth while theother portion provided with an aperture through which said toothprotrudes when said angularly spaced portions are parallel. a 1

6. A fastener made from a single piece of metalfand bent substantiallyY-shaped' in side elevation, the terminals of the head of the Y beingbent inwardly and pointed to provide oppositely extending piercing ends,whereby when the reduced portion of the Y is inserted into the slottedend of a tenon and the tenon and fastener are inserted and forced withinamortise' the spaced sides "of the Y are compressed within theslot ofthe tenon and the piercing ends are projected into oppositewalls at thebase of the mort-ise.

7 A mortise and tenon joint attaching device including a strip of metalbent substantially tri-angular in side elevation and having a terminalpointed and bent inwardly to form a portion of the baseof the triangle,whereby when the apex of. the triangle'is inserted in a slot in the endof a tenon and the tenon and device are forced into a mortise the sidesof the triangleare compressed by the walls of the slot to cause thepointed trminal to pierce the wall of the mortise at the base thereofand in a plane with the base of the mortise.

8; A mortise and tenon joint attachingtdevice, including a strip ofmetal'bent substantially tri-angular inside elevation, the base of thetriangle being formed by two oppositely projecting piercing points,lying side by side'and adapted when the sides of the triangle arecompressed to project in opposite directions and be disposed below therespective aligned portions of the sides, which portions act as aguiding means to preventany tendency of the pointslto rise during suchprojecting movement.

In testimony whereof I afiix my signature.

DAVID PELTON MOORE.

